Reinhold Nemetz Says Story Leak Makes His Tax Investigation Harder

BERLIN—Reinhold Nemetz may have uncovered an international sensation—a mysterious trove of art, much of it previously confiscated by the Nazis—but he's more focused on clearing up tax evasion.

"We don't see our task as art-historical," the district attorney of the Bavarian city of Augsburg told reporters this past week, shrugging off the clamor for more information about the more than 1,400 artworks found in a Munich...